Carrier ComfortLink 30GXN - Cooling Set Point (4 to 20 Ma)

39
reduce the current stages by the value entered for Loadshed
Demand delta. The Maximum Loadshed Time is the defines
the maximum length of time that a loadshed condition is
allowed to exist. The control will disable the Redline/Loadshed
command if no Cancel command has been received within the
configured maximum loadshed time limit.
Cooling Set Point (4 to 20 mA) — Unit operation is
based on an external 4 to 20 mA signal input to the Energy
Management Module (EMM). The signal is connected to
TB6-3,5 (+,–). Figure 19 shows how the 4 to 20 mA signal is
linearly calculated on an overall 10 F to 80 F for both Water
and Medium Temperature Brine COOLER FLUID configura-
tions. See Table 30 for configuration instructions.
LEGEND
EMM — Energy Management Module
Fig. 19 — Cooling Set Point (4 to 20 mA)
100
(38)
80
(27)
60
(15)
40
(4.4)
20
(-7)
0
(-17)
4 6.3 8.6 10.9 13.1 15.4 17.7 20
4 TO 20 mA SIGNAL TO EMM
SET POINT, F (C)
90
(32)
70
(21)
50
(10)
30
(-1)
10
(-12)
(FLUD = 2) MINIMUM
SET POINT 14 F (-10 C)
(FLUD = 1) MINIMUM
SET POINT 38 F (3.3 C)
MAXIMUM
SET POINT
70 F (21.1 C)